Derived from this FS2 Camera project I would like to make an sequential uploader that matches this use-case. Any file major than 50 Kilobytes will be uploaded in chunks of 50 Kb, using the following workflow:
Picture.jpg (150 Kb) -> Read fifo from Arducam -> Send first 50 Kb to upload API along with an md5 hash of this first 50 Kb (Called API from now on)
API uploads this first 50 Kb chunk and returns a true if md5(File)==hash received if not returns false
-> ESP board receives this signal and repeats the upload if it’s false up to N times (3 or 4 times at least)
sending the last part to API, we will add some parameter like EOF = 1
or something in this direction so the API understand this will be the
last part to receive. And in successful upload of this last part the
server side API will put this chunks together and return the full URL to
This can be the basis to upload big images with consistency.
As you can see here uploading any File that is larger than 40 / 50 Kb is already a big challenge. And I still didn’t saw this implemented anywhere so it will be a great challenge to build something in this direction
Developed by Espressif the ESP32 brings a new standard in low-cost WiFi boards. After porting one project to this new board I must say that it’s very similar to the ESP8266 and most code except some updated libraries, should work with minimal effort.
“ESP32 is a series of low-cost, low-power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. The ESP32 series employs a TensilicaXtensa LX6 microprocessor in both dual-core and single-core variations and includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power-management modules.” – Wikipedia description
What is still pending on my side is to compare power consumption and other details as WiFI range (With and without antenna) between ESP8266 and this new ESP32. But overall I’m really excited to build things on the top of this.
Combined with @tablatronix amazing WiFi Manager library it gives creators the possibility to have an independant IoT device with custom configuration, autoconnect and full info of the device.
It’s still pretty much on development so they are many things that are normally worst at the beginning (SPI Flash File System for example, a hell lot slower and at the moment only usable for small configuration files for me) But that’s normal, things are going to be fixed over the time, and hell it’s open source so let’s give these guys a hand and report new findings so they can fix it as soon as possible.
The ESP32 directory when installed using Arduino in Ubuntu is: /home/martin/.arduino15/packages/esp32 -> I find weird that Arduino keeps libraries in 3 different Folders making it very confusing to see library source code.
Yesterday I found some time to make an example of image push to the Cloud using Seafile storage. The idea is that instead of making a regular file upload that needs some kind of Backend gallery to preview the pictures, we can have a different take, like pushing the picture directly to your Cloud-storage.
WiFi Camera (C++) > API Endpoint (PHP) > Seafile cloud (Python/C)
So the first thing I tried is to browse the Seafile Web API manual and repeat in command line the curl commands. And then I found in packagist this great library that is a wrapper for all commands to implement them easily on your script.
For sure this would be also possible to do it without the middleware PHP, directly in C++ on the Espressif SoC, but I would like to have proper error handling and also to save a copy of the image in the case that the Cloud->push fails for any reason. It can be also a very complicated task considering they are at least 3 API calls using the bearer Auth token.
Short for Seafile upload this a code-example to make a PHP File upload using Seafile API and a simple JSON configuration
2- Edit the sea-config.json and add it along with your seafile server and repository ID settings
"repository_id": "Is on the last part of Url when opening a library: #my-libs/lib/REPOSITORY_ID"
3- That’s it ! You are ready to open the test provided in the github repository and see if the image appears on the cloud
In this entry, I wanted to document what is the process of making one of this cameras, starting from the 3D – model to the end product where you turn it on and connects to WiFi ready to take pictures.
After removing the support and sanding the round columns the first thing is to connect the front and back case together and see that they fit correctly. Usually, they do but PET is a tricky plastic to print and the end termination is a bit rougher than with PLA so it requires some post-production work. As an advantage, this plastic is stronger than PLA, and will stand a crash much better since it’s more elastic and resistant. I would say the best termination and strength balance would be to print this in ABS but I dislike the smokes and the fact that is also very difficult to print at home.
When this step is ready then it’s the time to heat up the soldier and prepare the ON/off switch and the shutter button. Then there are 8 cables more that go from the Arducam (2 or 5 mega version) to the Wemos D1, that is the responsible of uploading the picture to the cloud. This is a prototype for myself so it looks a bit messy but shows how it is at this stage:
Then comes the reality shock moment that is to connect the Wemos ESP8266 through USB to the computer and upload the program that will do the magic of receiving the JPEG image from Arducam and upload it to a php API endpoint. Usually, at this point there is something that needs to be corrected, but either nothing works or all is fine and dandy. I open the mobile hotspot and turn on the camera. See if connects, try to take a picture, preview it on the PHP-gallery. Try to test timelapse mode, see it works, and that’s pretty much it. A new camera is ready to be delivered.
And since I’m really lazy to delete this Gutenberg demo of WordPress new editor I will leave the rest here. In resume, in this new editor pressing (+) you can add anything you want in the world. And it would be even cooler if they add a magical (-) button so you can remove the content with the same ease as adding it.
The rest comes from the new editor bells & whistles and it’s not of my writing
Imagine everything that WordPress can do is available to you quickly and in the same place on the interface. No need to figure out HTML tags, classes, or remember complicated shortcode syntax. That’s the spirit behind the inserter—the (+) button you’ll see around the editor—which allows you to browse all available content blocks and add them into your post. Plugins and themes are able to register their own, opening up all sort of possibilities for rich editing and publishing.
Go give it a try, you may discover things WordPress can already add into your posts that you didn’t know about. Here’s a short list of what you can currently find there:
Text & Headings
Images & Videos
Embeds, like YouTube, Tweets, or other WordPress posts.
Layout blocks, like Buttons, Hero Images, Separators, etc.
And Lists like this one of course :)
A huge benefit of blocks is that you can edit them in place and manipulate your content directly. Instead of having fields for editing things like the source of a quote, or the text of a button, you can directly change the content. Try editing the following quote:
The editor will endeavor to create a new page and post building experience that makes writing rich posts effortless, and has “blocks” to make it easy what today might take shortcodes, custom HTML, or “mystery meat” embed discovery.
Matt Mullenweg, 2017
The information corresponding to the source of the quote is a separate text field, similar to captions under images, so the structure of the quote is protected even if you select, modify, or remove the source. It’s always easy to add it back.
Blocks can be anything you need. For instance, you may want to add a subdued quote as part of the composition of your text, or you may prefer to display a giant stylized one. All of these options are available in the inserter.
You can change the amount of columns in your galleries by dragging a slider in the block inspector in the sidebar.
If you combine the new wide and full-wide alignments with galleries, you can create a very media rich layout, very quickly:
Sure, the full-wide image can be pretty big. But sometimes the image is worth it.
The above is a gallery with just two images. It’s an easier way to create visually appealing layouts, without having to deal with floats. You can also easily convert the gallery back to individual images again, by using the block switcher.
Any block can opt into these alignments. The embed block has them also, and is responsive out of the box:
You can build any block you like, static or dynamic, decorative or plain. Here’s a pullquote block:
Code is Poetry
The WordPress community
If you want to learn more about how to build additional blocks, or if you are interested in helping with the project, head over to the GitHub repository.
Days after publishing this post about ArduCam and ESP8266 I got some good feedback and 2 friends asked me to get one Camera. At the same time my new 3D Printer “Prusa MK3” has arrived so I decided to make a case remake and release a new small Low-Resolution, instant WiFi upload Camera. What I’m trying to achieve here is a digital Polaroid. Press the shooter buttton and the JPEG will be uploaded to a digital gallery in the next 4 seconds. So it’s a pure WiFi camera, without memory card, and you need to be online to use it.
And that’s nowadays very easy right ? You just need to make a mobile hotspot in the phone if you are outside home. And if the camera does not detect a WiFi then creates an Access point called:
Then you have to connect to it through the phone and browse 22.214.171.124 there will greet you a “WiFi manager” so you can select a WiFi and write the credentials to make a connection. After that you are all set, you just need to enable the hotspot and the camera will reset and connect to it automatically.
It can take a picture both with the shutter button or have a Video stream or Photo shoot via the Web UI. ( cam.local )
3D Renderings made with Blender
I decided to make a small release of 5 FS2 digital WiFi instant upload cameras at the price of 70 € each.
Materials and costs if anyone is interested to make one are the following:
1S 3.7V Li-Polymer (Got one in eBay)
Battery size: 6 x 41 x 68mm 2000mAh /hr 8.50 €
Charger: Adafruit Micro Lipo w/MicroUSB Jack (eBay Not in the picture since this is just my personal prototype) 8 €
Various connectors and cables (8 Pin SPI white) 2.5 €
That gives a total of 50 € as total hardware costs, printing the case and testing that all works together I’m summing up and additional 20. And you can get 1 year of API use for free. Then you can move it to your own server or you will get part of my Amazon AWS invoice ;)
With the battery full loaded should be online for about 18 hours. It has an On/Off switch that is still not in the picture.
The photos now when it has all cables soldered are better than before although I liked some of the strange effects when the cables where loose. The idea is to make a camera that you shoot blindly without looking at the frame. That gives for me interesting results and I had a lot of fun with it. That combined that in about 4 seconds the picture is already online is really cool. If you are interested in getting one just contact me through this website. Shipping costs are not included.
Photo shooter has 3 options:
ONE CLICK Shuts only one picture
LONG CLICK enters time-lapse mode (a picture every 5 min. but can be configured to your request, should be minimun time 5 seconds though)
I’ve been having some fun taking pictures last weekend with a self built camera. It costs about 15 € in Ebay and summing up the 6 of the ESP8266 Wemos D1 it makes a total hardware cost of 21 euros. Let’s say 35 if you add a Lion battery and an USB charger to it.
The most basic layout looks like this.
Using here a 2 megapixels ArduCam. There is also a 5 megapixels version. The Pin definition of the camera is like any other serial parallel interface device:
I got some critics saying that this is of course invented and I’m not creating anything new here. But of course the idea is not to make a professional WiFi camera. If so I will simply get one ! The idea was to built one from the scratch.
And the beauty of it is that it does not take perfect pictures. Just because now it’s not soldered sometimes it makes an interesting noise in the pictures and imperfections. The idea is to take this and make it whatever you want. Like for example a security cam that takes a serie of pictures or even records a stream when it detects movement. Or get a 5MB pixels more advanced camera and pack it together in a 3D printed case putting a shutter button and some eink display to preview the picture and change settings.
This is an example of a picture with noise:
And this another one when the right amount of light is there and the cables are good connected
I’ve been working on the last days doing extensive API testing and needed to find an easy way to document my tests. Postman offers already something very useful that uploads your tests documentation to their website. But sometimes we need just a simple HTML that can be privately delivered to the client.
The intention of this simple PHP script is to generate a Standalone HTML for your Postman tests that you can send to the client without the need to upload all the tests in the open internet.
It serves to achieve two things:
Make a standalone HTML document from your Postman Collections
Import the test run-results into a mysql database
With the second one only the importing is done. It’s then up to you how to present this data. It populates two tables, resume and detail, first one with the performance result and the detailed with a line per test. Much more information can be extracted from the runner json this is just a kickstart idea. Have fun with it!
Since last year, when I started 3D-printing, I bought my first printer just to see if I find my way into it.
Since then I found out that I could remember my days in the university studing graphic design and that I can actually design pretty well. But from that to product design there is million-light years. Anyways I like a lot Blender as a 3D Modeling software and I’m starting to get quite advanced doing my own models.
That combined with my passion to soldier electronic stuff and to create new devices has found it’s way. So it’s time for a more professional update.